added .travis.yml file for jdk8
Merge branch '8.0' of https://github.com/JFXtras/jfxtras-labs into 8.0
add maven repo to solve failing build with unknown dependency
correct build script
deactivate cache
Merge pull request #79 from McFoggy/8.0

Introduce travis.yml file in 8.0 branch. Build is failing in my travis perso page due to a cache issue that I do not understand yet.